Show user what options they have voted (#11195)

* Add own_votes field to poll results in REST API

Fixes #10679

* Display user votes in WebUI

* Update styling

* Add vote checkmark to public pages

app/javascript/mastodon/actions/importer/normalizer.js

@@ -73,8 +73,9 @@ export function normalizePoll(poll) {
 
   const emojiMap = makeEmojiMap(normalPoll);
 
-  normalPoll.options = poll.options.map(option => ({
+  normalPoll.options = poll.options.map((option, index) => ({
     ...option,
+    voted: poll.own_votes && poll.own_votes.includes(index),
     title_emojified: emojify(escapeTextContentForBrowser(option.title), emojiMap),
   }));